William a



No. 626,489. Patented June 6, |899. w. A. Downes.

DOPE CUP.

(Application led Apr. 29, 1898.) (No Modal.)

UNiTnn STATES PATENT OFFICE.

IVILLIAH A. DOIVNFS, OF DETROIT, MICHIGAN, ASSIGNOR TO THE PEN` BERTHYINJECTOR COMPANY, OF SAME PLACE.

DOPE-CUP.

SPECIFICATION formingrpart of Letters Patent No. 626,489, dated J' une6, 1899.

Application filed April Z9, 1898.

To @ZZ whom it may concern.-

Be it known that I, WILLIAM A. DowNEs, a citizen of the United States,residing at Detroit, in the county of IVayne and State of Michigan, havein vented certain new and usefullmprovements in Dope-Oups, of which thefollowing is a specification, reference being had therein to theaccompanying drawings.

The invention relates to oil or dope cups; and it consists particularlyin the locking means for the stem of the actuatingepiston, all as morefully hereinafter described and claimed.

In the drawings I show my invention applied to a dope-cup.

Figure l is a vert-ical central section therethrough. Fig. 2 is adetached perspective view of the lock-nut and its locking-spring.

Arepresents the casing of a dope-cup,whioh has an apertureddischarge-nipple B, O being the passage therethrough. D is the cap ofthe cup,which I show screwed thereon. The cap is centrally apertured,and through it passes the screw-threaded stem E, having on its end thepiston F.

G is a spring between the cap and piston, and this spring is contractedor allowed to eX- pand by means of an exterior adjusting-nut. It isevident as the nut is turned up the spring can expand and will push downthe piston and force out the dope below.

These cups are often placed on moving parts of machines, and when thusplaced the nut 'II often becomes loose and allows feeding down of thepiston more than is desired. To form an inexpensive means of preventingthis, which at the same time does not prevent the adjustment of the nut,I construct the device as follows: I is a spiral spring, which willSerial No. 679.257. (No model.)

fit in the threads of the stem with sufficient friction to prevent itsaccidental turning,and this spring I connect to the nut, which thusholds the nut. The means of connection and arrangement of these parts isnot material; but I prefer to `form in the bottom of the nut a recess J,in which the sprin g is arranged, and form an offset or pin K at thelower end of the spring, which pin is engaged in an aperture L in thenut.

What I claim as my invention is" l. In an oiling device the combinationwith a screw-threaded stem, of a spiral spring frictionally engaging thethreads thereon, and a nut on the stem to which the spring is secured atone end.

2. In an oiling device the combination with a screw-threaded stem, of anut thereon, having a recess therein, a spiral spring in the recessfrictionally engaging the threads ofthe stem and having one end securedto the nut. 3. An oil-cup the combination with the oilcup casing, andits cap, of the stem passing through the cap, a piston on the end of thestern within the cup, a spring between the cap and piston,an adjusting-nnt for the spring on the stem outside the cap, said nut having arecess in its lower edge around the stem, a spiral spring in the recessengaging the threads of the stem, and an oifset or pin on the lower endof the spring detachably engaging an api IVILLIAM A. DOVVNES.

Vitn esses:

M. B. ODOGHERTY, OTTO F. BARTHEL.

